payment safety about doctor private account

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Hello every one. I want to do cll in Turkey but I confused the payment. They do not provide me hospital bank account. They said the hospital bank account would make the price 20% up for tax. And they provide me doctor' account.
In this situation. If I pay and the doctor do not do the surgery, what document could help me to fight? Does The surgery report with doctor sign and hospital stamp works?

Thanks for every advice. Best wish.

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Dear friend. I would tell you after I do the surgery but now I am afraid of the payment and confused. Could you give me so advice?

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Dear friend. Do you think it is safe to transfer to doctor'account? In what way could you prove you have pay for limb lengthening?